Explanation: To prevent the CNC controller unit, servo, spindle, I/O, CRT and other unit communication interfaces from being burned due to AC power leakage caused by improper electrical box configuration and power restriction policies in mainland China, most customers use generators for power generation, which leads to unstable power supply changes. This information is made for the reference of manufacturers in order to prevent and reduce the occurrence rate of electrical leakage caused by poor quality of power supply in personal computers during DNC computer communication operation.

Improvement methods:

One When using a PC personal computer for DNC communication connection, the chassis of the personal computer must be grounded together with the machine.

II Each Mitsubishi controller machine needs to be independently grounded.

III Connect the 24VDC terminal block of the power supply to the grounding plate of the electrical box after short circuiting the 0V and FG grounding terminals.

4 Add an optical coupling protector (RS232C ISOLATOR PROTOCT) between the personal computer and the machine for DNC connection.

Five The 0V line (with wired voltage) in the external three-phase four wire power supply must never be grounded together with the machine.

VI A power stabilizer needs to be installed.

7 Connect the 24VDC terminal block, 0V, and FG grounding terminals of the power supply to the grounding plate of the electrical box after short circuiting.

8 Divide the power supply into two parts, one supplying to I/O (the amperage is determined by the number of connections), and the other supplying to NC (3 amperes) and CRT screen (1.5 amperes), requiring at least 4.5 amperes to prevent I/O short circuits from simultaneously affecting NC.

Nine Attention should be paid to the heat dissipation of the NC body and amplifier inside the electrical box, and the heat source should be placed outside the electrical box.

Ten Do not use exhaust fans, use heat exchangers as cooling systems, and pay attention to the sealing effect inside the electrical box. If there are unused holes, please take measures to block and isolate them to prevent oil, gas, and iron powder from being sucked in. It is recommended to add rubber pads at the junction of the electrical box door.

Eleven Attachment 1 is the wiring essentials excerpted from the M60S series connection manual. For more detailed information, please refer to the M60S series connection manual or contact Mitsubishi's relevant technical personnel.

Twelve Attachment 2 is an example of electrical box distribution for milling machines and lathes.

Thirteen The distribution situation of this electrical box will be subject to initial machine inspection and certification by Mitsubishi's relevant technical personnel. If there is any violation of the relevant distribution rules that causes product damage, and if improvement is not strengthened after advice, even if the damage is within the warranty period, the relevant repair costs will be borne.

The above are several methods to prevent improper damage to CNC controllers. Dongguan Xiufeng Sanye Machinery Equipment Manufacturing Factory specializes in the production and sales of various types of machine tools such as wire feeding machines, fine hole discharge machines, spark machines, etc. If you have any needs, you can consult Wang Sheng by phone at 13922985987.